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Forcematic-Clamp Pressure Control

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Forcematic-Clamp Pressure Control

  1. 1. Force-Matic Fully Mechanical Pressure Control Roll Damage Prevention
  2. 2. REDUCED DAMAGE COSTS ARE OUR MISSION AND CUSTOMERS VISION DELIVERY FROM PAPER MILL TO ENDUSER PRINTER
  3. 3. 60 years experience in Paper Roll Handling!
  4. 4. The paper rolls may be handled up to 15 times before delivery to the customer ! The transport chain of forest products is often very long. A paper roll may require as many as 15 handling stages on its way from paper machine to the printing machine. This makes it essential to use well-chosen, well-maintained equipment dedicated to forest products handling. Paper handling in general
  5. 5. How to select the correct clamping force?
  6. 6. The paper handling problem <ul><li>Forest products, and paper rolls in particular, are one of the most demanding cargo commodities requiring specialized lift truck attachments. </li></ul><ul><li>Paper rolls are heavy, prone to handling damage, difficult to handle and have a considerable unit value. </li></ul><ul><li>The transport chain of forest products is often very long. As many as 10 to 15 different handling stages may be required to get the paper roll from the paper machine to the printing machine. </li></ul><ul><li>It is essential to use well-chosen, well-maintaned equipment which is dedicated to forest products handling. </li></ul>
  7. 7. Newsprint <ul><li>Small paper rolls </li></ul><ul><li>• Typical weight 500 - 1600 kg (1,100 - 3,300 lbs) </li></ul><ul><li>• Typical roll width/height 800/1200/1600 mm (31.5”/47”/63”), lots of variations </li></ul><ul><li>• Typical diameter below 1300 mm (51”) Future 1500 mm!!!! </li></ul><ul><li>Relatively soft paper </li></ul><ul><li>• Prone to out-of-roundness damage </li></ul><ul><li>• Does not require very much clamping force </li></ul><ul><li>• Does not tolerate excessive clamping force </li></ul><ul><li>• Often high recycled fibre content </li></ul><ul><li>• Typical grammage 35 - 55 g/m2 </li></ul>Paper handling in general
  8. 8. Magazine paper <ul><li>Bigger paper rolls </li></ul><ul><li>• Typical weight up to 7000 kg (13,000 lbs) </li></ul><ul><li>• Typical roll width/height up to 4600 mm (140”), lots of variations </li></ul><ul><li>• Typical diameter below 1300 mm (1350 -53”) </li></ul><ul><li>Medium hard paper </li></ul><ul><li>• Tolerates clamping quite well </li></ul><ul><li>• Requires high clamping force </li></ul><ul><li>• Typical grammage 50 - 100 g/m2 </li></ul>Paper handling in general
  9. 9. Tissue paper <ul><li>Large diameter rolls </li></ul><ul><li>• Typical weight up to 5000 kg (11,000 lbs) </li></ul><ul><li>• Typical roll width/height up to 2000 mm (78”), lots of variations </li></ul><ul><li>• Typical diameter up to 2500 mm (98”), </li></ul><ul><li>lots of variations </li></ul><ul><li>Soft paper </li></ul><ul><li>• Soft, sometimes very soft paper </li></ul><ul><li>• Requires minimum clamping force </li></ul><ul><li>• Deforms easily under clamp pads </li></ul><ul><li>• Low grammage </li></ul>Paper handling in general
  10. 10. <ul><li>Bigger paper rolls </li></ul><ul><li>• Typical weight up to 6000 kg (13,000 lbs) </li></ul><ul><li>• Typical roll width/height up to 3600 mm (140”), lots of variations </li></ul><ul><li>• Typical diameter below 2000 mm (78”) </li></ul><ul><li>Relatively hard paper </li></ul><ul><li>• Tolerates clamping quite well </li></ul><ul><li>• Requires high clamping force </li></ul><ul><li>• Typical grammage up to 160 g/m2 </li></ul>Paperboard Paper handling in general
  11. 11. What is the correct clamping force?
  12. 12. <ul><li>Clamping force is usually given in kN (kiloNewton) </li></ul><ul><li>1 kN (1000 N) corresponds to a weight of approximately 100 kg (220 lbs) on the paper roll </li></ul><ul><li>20 kN clamping force corresponds to a weight of 2000 kg (4,400 lbs) on the paper roll </li></ul>What is clamping force? 2000 kg
  13. 13. Max clamping force according to weight of the roll: Paper quality Clamping factor Newsprint 1,0-1,6 Kraftliner 1,5-1,8 SC Printing paper 1,6-2,0 LWC print.paper/KCB Kemiart 1,7-2,2 Roll Tissue/Fluff Paper 1,1-1,3 For example: Total paper weight 4000 Kg x factor 1,3 = total pressure = 5200 kp What is correct clamping force ? Measuring and control of clamping force Selecting the correct clamping force according to handled paper quality
  14. 14. Always follow the paper mill’s instructions! Selecting the correct clamping force
  15. 15. Excessive clamping force is one of the main reasons causing paper roll out-of-roundness during the clamp handling. Clamping force must be adjusted to suit the requirements of the paper roll and the handling chain. This is especially important with paper grades which are prone to out-of-roundness damage. In principle each paper roll and each handling operation would require individual clamping force setting. This can only be done with an automatic, intelligent clamping force control. The Dilemma of Optimum Clamping Force F c F c F c F c F c F c F c F c ?
  16. 16. What is the correct clamping force? Too high clamping pressure • Rolls may deform • Roll cores may deform • Out-of-roundness
  17. 17. What does out-of-roundess mean to end customer ? <ul><li>The printing presses run faster and faster and maximum out-of-roundness tolerance is 2 mm (0,08”) </li></ul><ul><li>Exceeded out-of-roundness can cause: </li></ul><ul><ul><li>break of paper web during printing </li></ul></ul><ul><ul><li>problems during automatic roll change </li></ul></ul><ul><ul><li>bad printing quality </li></ul></ul><ul><ul><li>reduced printing speed </li></ul></ul><ul><ul><li>late distribution of daily newspaper </li></ul></ul><ul><ul><li>increased production costs </li></ul></ul>What is the correct clamping force? Too high clamping pressure
  18. 18. • Out-of-roundness is measured by the difference of radius • Measured in millimeters (mm) • Depending of the amount of handling times it gives different shape of damage What is the correct clamping force? Definition of out-of-roundness Too high clamping pressure
  19. 19. <ul><li>Paper roll out-of-roundness can easily be controlled with our ”Spider” </li></ul><ul><li>Testing can be used as a quality control tool for defining the correct operation of the paper handling chain. </li></ul><ul><ul><li>Troubleshooting </li></ul></ul><ul><ul><li>Handling surveys </li></ul></ul><ul><ul><li>Regular quality control </li></ul></ul>What is the correct clamping force? How to check?
  20. 20. Too low clamping pressure • Rolls may drop • Rolls may slide • Rolls may telescope
  21. 21. Results after handling paper roll with to low clampinng force . <ul><li> Roll slided inside the wrapper </li></ul><ul><li>Roll slided all the way to the bottom of the wrapper </li></ul><ul><li>Wrapper bottom carried a major part of the roll weight (like a paper bag) </li></ul><ul><li>Lower corners of the wrapper got rounded . </li></ul><ul><li>Crimped edges appeared!!!! </li></ul>Too low clamping pressure
  22. 22. Crimped edges at bottom of paper roll UPM 13.09.2006 Too low clamping pressure
  23. 23. Feel safe with us! We have all solutions for damage free handling with correct clamping force!
  24. 24. How to Select a Clamping Force Control System Clamping Factors when handling various paper grades Paper grade Clamping Factor k d 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 Newsprint Kraftliner Coated paperboard SC Printing Paper LWC Printing Paper / KCB KemiArt Tissue / Fluffy Paper Special Sensitive Paper
  25. 25. <ul><li>This fully mechanical valve is a proportional pressure control system specifically designed for lift trucks equipped with a paper clamp. </li></ul><ul><li>Works basically as a mechanical calculator, continuously adjusting the clamping pressure as a function of three measured hydraulic pressures (lifting and two sides of the tilting cylinder). </li></ul><ul><li>The system can be calibrated to suit most combinations of lift trucks and paper clamps available on the market. </li></ul>Force-Matic - the new solution!
  26. 26. <ul><li>Effective pressure control device </li></ul><ul><li>Prevent paper roll deformation by adjusting the clamping pressure according to the roll’s weight </li></ul>Force-Matic key features Clamping force Weight of paper roll
  27. 27. <ul><li>Fully mechanical, no electrical connections required </li></ul><ul><li>Fully enclosed </li></ul><ul><li>Easy installation </li></ul>Force-Matic key features
  28. 28. <ul><li>Built around standard hydraulic components </li></ul><ul><li>Mechanichal components only </li></ul><ul><li>Heavy duty aluminum construction </li></ul><ul><li>Virtually maintenance free </li></ul>Force-Matic key features
  29. 29. <ul><li>Double weighing system for a better control of output pressure </li></ul>• Fully mechanical adjustment of all parameters to fit forklift, clamp and paper rolls to be handled. • Mechanical adjustments are calculated in special software Force-Matic key features
  30. 30. <ul><li>Easy to adjust </li></ul><ul><li>Adjustments are quite straightforward and can be done by using normal tools </li></ul>Force-Matic key features
  31. 31. <ul><li>A wide adjustability range, a dapts to most truck-clamp combinations </li></ul>Force-Matic key features
  32. 32. During normal lifting process weight of paper roll is calculated Fully Mechanical Pressure Control
  33. 33. Force-Matic function Clamping force kN Kg Calculation of required calmping force x kN = y bar Weight of paper roll
  34. 34. Force-Matic key function The system continuously solves a polynomial expression in the form of : P(x,y,z) = Ax+By+(C+D)z +E
  35. 35. Adjustment of clamping force according to selected clamping factor Fully Mechanical Pressure Control y bar
  36. 37. Bolzoni Auramo – Made by experts to the specialists Thank you for your attention

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  • redmountainclimber

    May. 4, 2010
  • promijn

    May. 29, 2012
  • AdrianSaveliev

    Jan. 22, 2018
  • SultanAlGhamdi24

    Mar. 24, 2018
  • aodaodphuwattanakun

    Jun. 15, 2018
  • AGUSPURWANTO76

    Oct. 27, 2018

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